MySQL5.7出来蛮久了,今天用官方的RPM包安装玩了一遍,与值之前的版本有些差异,MARK下。
OS PLATFORM:Centos 7.3
安装MySQL 5.7版本,官网http://dev.mysql.com/downloads/repo/yum/
rpm -ivh http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
YUM安装:
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yum -y
install
mysql-community-server
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速度不是很快,慢慢等。。。。。。。。。
更改DATADIR
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sed
- i
's/datadir=/var/lib/mysql/datadir=/data/mysql/'
/etc/my
.cnf
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启动数据库
/etc/init.d/mysqld start #该过程包含初始化数据库
MySQL5.7新特性,为了加强安全性,为root用户随机生成了一个密码,在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码,然后登录mysql进行修改:
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# grep 'temporary password' /var/log/mysqld.log
2017-08-16 T14:51:45.705458Z 1 [Note] A temporary password is generated
for
root@localhost: a&sqr7dou7N_
mysql -uroot -p
'a&sqr7dou7N_'
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登陆上过后,进行正常操作会受限,提示你必须修改密码后才能进行操作,根据提示修改密码:
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mysql> SET PASSWORD = PASSWORD(
'123456'
);
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
mysql> SET PASSWORD = PASSWORD(
"root"
);
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
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但是提示根据当前密码策略,设置的密码不允许。
查阅官方文档后发现有以下三种密码策略:
Policy Tests Performed
0 or LOW Length
1 or MEDIUM Length; numeric, lowercase/uppercase, and special characters
2 or STRONG Length; numeric, lowercase/uppercase, and special characters; dictionary file
当前密码策略默认为1 也就是 MEDIUM
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mysql root@localhost:(none)> show VARIABLES like
"%password%"
+---------------------------------------+---------+
| Variable_name | Value |
|---------------------------------------+---------|
| default_password_lifetime | 0 |
| disconnect_on_expired_password | ON |
| log_builtin_as_identified_by_password | OFF |
| mysql_native_password_proxy_users | OFF |
| old_passwords | 0 |
| report_password | |
| sha256_password_proxy_users | OFF |
| validate_password_dictionary_file | |
| validate_password_length | 8 |
| validate_password_mixed_case_count | 1 |
| validate_password_number_count | 1 |
| validate_password_policy | MEDIUM |
| validate_password_special_char_count | 1 |
+---------------------------------------+---------+
13 rows
in
set
Time: 0.030s
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更改密码的策略是 数字 小写字母 大写字母 特殊字符 长度至少8位 。
更改完密码就可以进行数据库的操作了。
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mysql root@localhost:(none)> show DATABASES;
+--------------------+
| Database |
|--------------------|
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows
in
set
Time: 0.009s
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接下来修改默认密码策略(当然实际环境是不推荐修改为更低安全策略的)
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mysql root@localhost:(none)>
set
global validate_password_policy = 0;
Query OK, 0 rows affected
Time: 0.003s
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设置完默认密码策略后,就只有 密码长度限制 了。默认为字符长度至少8位。
想要永久关闭密码复杂安全策略,则在配置文件中加入以下并重启mysqld即可:
[mysqld]
validate_password=off
参考资料:
官网资料地址:
https://dev.mysql.com/doc/refman/5.6/en/alter-user.html
MySQL 5.7 的初始化操作
http://professor.blog.51cto.com/996189/1783769